Consolidated Income Statements - Unaudited - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
REVENUES	$ 164,508,000	$ 141,506,000	$ 474,871,000	$ 407,134,000
Cost of revenues	129,320,000	110,613,000	365,808,000	319,228,000
Gross profit	35,188,000	30,893,000	109,063,000	87,906,000
General and administrative expenses	17,506,000	16,937,000	50,810,000	48,084,000
Income before income tax provision	17,682,000	13,956,000	58,253,000	39,822,000
Income tax provision	3,824,000	2,576,000	11,480,000	8,275,000
NET INCOME	$ 13,858,000	$ 11,380,000	$ 46,773,000	$ 31,547,000
Net income per common and common equivalent share
Basic	$ 0.78	$ 0.64	$ 2.62	$ 1.76
Diluted	$ 0.76	$ 0.63	$ 2.57	$ 1.74
Weighted average common and common equivalent shares
Basic	17,785,000	17,899,000	17,841,000	17,939,000
Diluted	18,211,000	18,180,000	18,221,000	18,156,000